furnace refractory bricks for Ladle furnace BOF BF preheating
furnace electric arc furnace
Made of fused mag-chrome, magnesite and chromite;
processed by ultra high temperature firing.
With properties of very good thermal shock stability,
oxidation-reduction resistance, thermal fatigue resistance, wear
resistance and erosion resistance.
Especially with ultra strong resistance to slag attack and vacuum
damage.
Under vacuum refining condition, or strong oxidation atmosphere, or
ultra high temperature liquid erosion, or high alkaline slag and
frequent alkalinity changes slag attacks．
They are proved to be the irreplaceable, the longest service life
and the most economical furnace lining refractories.
Therefore they are widely used in the vacuum refining furnaces (eg.
RH Gegasser, VOD degassing ladles), Argon Oxygen Refining Furnaces
(eg. AOD Converters), ultra high power EAF furnace, non-ferrous
smelting big furnaces ( IC3 Refining Converters, Pierce Smith
Converters, Noranda Furnaces, Outokumpu Flash Smelting Furnaces),
or used at key parts of refining furnaces under very harsh
conditions, eg. Working linings, hot spots, slag line zone, tuyere
zone, erosion zone and easily damaged parts of big furnaces.
Aluminum oxide wear-resistant thermal refractory fire bricks
At present,our main products are clay brick,sillica brick,high
alumina bricks,mullite bricks,carborundum brick,magnesite
refractory castable ,spun injection type aluminum sillicate
alcupunctue blankets,aluminum sillicate fiber products,such as all
kinds of refratory materials,not only have good reputation among
the same industry at home and sales perfomance ,but also have a
good service.Produces are mainly covers metallurgy,steel,chemical
industry building materials, thermal power,coking and other high
temperture fields.
Advantages
1, Guarantee period is one year , since the date of purchasing.
2, 24- hour technical supports.
3, Design product according to the customers requirement.
4, We provide available price.
| High-alumina Brick QRL-65 Physical and Chemical Indexes |
| AL2O3 ,% | ≥42 |
| refractoriness ℃ | ≥1750 |
| Reheating linear change rate (1500 degrees *2h) | -0.3--0.1 |
| Apparent Porosity AP,% | ≤21 |
| Cold Crushing Strength CCS,Mpa | ≥40 |
| Volume Density BD,g/cm³ | ≥2.15 |
| Creep rate% (1250℃*50h)0.2Mpa | <0.8 |
| Details |
Brand |
Silica Brick
|
Fire clay
|
Special High Alumina
| Cordierite | | | JNLA | JN40a | JN40b | BGZ-65 | BGZ-70 | JLZ-75 | JHL-75 | SDHA60S | | | Al2O3 % | ≤1.5 | 30～36 | ≥40 | ≥40 | | | ≥75 | ≥75 | ≥60 | ≥40 | | Fe2O3 % | ≤1.5 | ≤2.5 | ≤2.0 | ≤2.0 | | | | ≤0.8 | ≤1.5 | | | SiO2 % | ≥94.5 | | | | ≥65 | ≥70 | | | | | | K2O+Na2O % | CaO≤2.5 | | | | | | | ≤0.5 | | MgO≥3 | ℃
Refractoriness | | ≥1690 | ≥1730 | ≥1730 | | | ≥1790 | ≥1790 | ≥1790 | ≥1580 | ℃
Refractoriness under Load | KD≥1650 | | Ta≥1450 | Ta≥1400 | Ta≥1320 | Ta≥1350 | KD≥1550 | KD≥1650 | Ta≥1640 | | %
Permanent Linear Change | 1450℃×2h
0～+0.2 | | | | | | 1500℃×2h
+0.1～-0.4 | 1500℃×2h
0～+0.3 | | 1300℃×2h
0.7 | %
Apparent Porosity | ≤22 | ≤24 | ≤24(22) | ≤20 | ≤24 | ≤22(24) | ≤21(23) | ≤20 | ≤18 | ≤20 | ≤30 | g/cm3
Bulk Density |
≤2.33
True
Density
|
≤2.34
True
Density
| ≥2.0 | ≥2.0 | ≥2.0 | | | | ≥2.65 | ≥2.4 | | MPa
Cold crushing strength | ≥40 | ≥35 | ≥25(20) | ≥35 | ≥30 | ≥35(25) | ≥40(30) | ≥65 | ≥90 | ≥50 | ≥15 | (1100℃ )
Thermal shock resistance(cycles) | | | | | | | | | ≥35 | ≥20
(DIN51068) | ≥20 | ≤1.0%
Residue quartz | ≤1.0 | | | | | | | | %
(1000℃) | ≤1.28 | ≤1.30 | | ≤0.6 | ≤0.6 | | | | | ≤0.6 | |
Application |
Furnace
bottom, wall
|
Others
|
Regenerator wall brick and checker
|
Coking chamer,
combustion chamber
|
Door
|
|
|
